Cosmological abundance of colored relics

The relic cosmological abundance of stable or long-lived, charge neutral, colored particles gets reduced by up to 4 orders of magnitude by annihilations that occur after QCD confinement. We compute the abundance and the cosmological bounds on relic gluinos. The same postconfinement effect strongly enhances coannihilations with a lighter dark matter particle, provided that their mass difference is below a few giga-electron volts. Charged colored particles (such as stops) can instead form baryons, which can be (quasi)stable in some models.